Self-arrest is a mountaineering related maneuver in which a climber that has fallen and is sliding down a snow or ice slope arrests (stops) the slide by himself without recourse to a rope or other belay system.

Self-arrest can be performed by using an ice axe or by using the climber's hands, feet, knees and elbows. Self-arrest with an ice axe is a difficult maneuver, but without it the probability of effectively arresting a fall is greatly diminished

We went up in the mountains today to practice our self-arrest technique.